21505161

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{229}}^1\times {\mathrm{1361}}^1$

素因数の和:1616

約数の個数: 16

約数和(自身を含む): 30072960

約数和(自身を除く): 8567799

約数列:

[1, 3, 23, 69, 229, 687, 1361, 4083, 5267, 15801, 31303, 93909, 311669, 935007, 7168387, 21505161]

約数ペア:

[(1, 21505161), (3, 7168387), (23, 935007), (69, 311669), (229, 93909), (687, 31303), (1361, 15801), (4083, 5267)]